My father was an unrepentant abuser - controlled and irreversibly changed my mother, assaulted my younger siblings and took most of his abuse out on me. My siblings are too young to remember the worst of it and my 16 year old brother was the apple of his eye, so it's my mother and I who have the clearest recollection of him. He died in 2012, so I've had time to adjust and process what happened.
It would be very easy to hate him, I would have every right to do so. But over the last three years, I've found that I don't hate him. I stored a lot of anger towards my father, however, it wasn't hatred. I'm capable of many volatile emotions, but I've never been able to hold onto hatred. It just slips past me. Anyway, the emotions I felt were unexpressed rage over him not having any sort of punishment for his actions. He died, but as I don't share his religious convictions, he isn't in any sort of Hell in my mind. He's just dead. To me, it wasn't fair that he could not get any sort of retribution for all that he did. But I learned to let go, mostly. I accepted that although bitterness over the situation was perfectly valid, it would only serve to strengthen his legacy and I would have no part in that.
Nowadays, I feel nothing towards him. I really don't. I don't talk of him, I don't think of him, I don't interact with his memory in any form. I don't hide from my past, but I don't let him hold me down. I won.